YJ40K External Laser Rangefinder with Ballistic Calculation
The YJ40K is a compact and lightweight clip-on laser rangefinder designed for individual outdoor operations. It integrates precision ranging, ballistic calculation, environmental sensing, wireless communication, and laser target indication into a single device.
Key Functions
Single Distance Measurement
Continuous Distance Measurement
Ballistic Calculation
Laser Target Indication
Temperature, Humidity, and Barometric Pressure Measurement
OLED Display
Battery Status Display
Bluetooth Data Transmission
APP Connectivity
Kestrel Weather Meter Integration
External Communication Interface (UART)
Designed for Individual Outdoor Applications
Product Highlights
Advanced Ballistic Solver
Compact and Lightweight Design
Long Battery Life
Up to 5,000 Measurements per Battery
Infrared & Green Laser Pointer
Quick Mounting System
Wireless APP Data Transmission
Technical Specifications
| Parameter | Specification |
|---|---|
| Laser Wavelength | 1535 nm |
| Measurement Range | 10 – 4000 m |
| Eye Safety Class | Class 1 (Indicator Laser: Class 3B) |
| Adjustment Range | ±1.5° |
| Laser Pointer Distance | 800 m (Night) |
| Range Accuracy | ±1 m |
| Measurement Frequency | 3 Hz |
| Measurement Success Rate | ≥98% |
| Beam Divergence | 0.6 ± 0.1 mrad |
| Angle Measurement Range | Elevation: ±90° (±1°) |
| Temperature Measurement Range | -40°C to +60°C (±1°C) |
| Humidity Measurement | 0–100% RH (±5%) |
| Altitude Measurement Range | 0–5000 m (±20 m) |
| Barometric Pressure Measurement | Supported |
| External Power Supply | DC 3–5 V |
| Battery Type | CR123A × 1 |
| Measurement Capacity | Up to 5,000 Measurements |
| Display | 1.3-inch OLED Screen |
| Bluetooth | Bluetooth 5.0 |
| Communication Port | UART (TTL 3.3V) to USB |
| APP Connectivity | Supported |
| Weight | 230 g |
| Dimensions | 77 × 56 × 47 mm |
| Operating Temperature | -40°C to +50°C |
| Storage Temperature | -50°C to +65°C |
| Waterproof Rating | IP67 |
Applications
Long-Range Precision Shooting
Hunting and Wildlife Observation
Tactical Operations
Military and Law Enforcement
Outdoor Reconnaissance
Border Patrol
Search and Rescue Missions
Professional Ballistic Analysis
The YJ40K combines high-precision ranging, advanced ballistic calculation, environmental monitoring, and wireless connectivity in a rugged, lightweight package, making it an ideal solution for demanding outdoor and tactical applications.